改错 I don’t know when will they come

改错 I don’t know when will they come When will they come here ? I really don't know .(合并为一句) I don't konw when exactly they will come.P_,they will come t I don't know when he _(come)back.when he _(come)back,I will i don't know who will come 把复合句改成简单句：1.i don't know when i will come back.→i don't know They don't know when Mr li_____ 这里为什么用will come I don't know when Rose will come tomorrow.Would you please t I don't know when I will come back改为同义句 I don't know!Why people will cry when they sad? Why do they I don’t know when it is that he will come back. when will they hold the meeting?I don't know.Maybe sometime